王老师的钱包里有2元和5元的纸币共18张，总共54元。2元和5元的纸币各有多少张？6\(C;e8\:G+K1F
算式：提示;L:Z9N8M/@;l/X1M2`8R,B2k2o*q-c2[6\(C;e8\:G+K1F
答：2元的纸币有2W*F+w/n9z5H0H2Z:L7?']张，5元的纸币有)v;P(@5i8d9c1f5K;P2d3e-L张。6\(C;e8\:G+K1F